Breitbart has been condemned for featuring racist, sexist and anti-Semitic content.

"We regularly work with our media buying partners to ensure our ads do not appear on sites that aren't aligned with our values as a company," Charles said. "This involves reviewing websites where ads could potentially be placed using filtering technology to assess site content. As you can imagine, there is a very large volume of websites, so occasionally something is inadvertently missed."

'I Had To Do It': Dylann Roof's Confession Played at Trial

A taped confession played for jurors at Dylann Roof's trial shows the accused killer of nine people laughing and confessing to the murders. "I did it," he said in the tape played on Dec. 9, 2016. "I had to do it." (Published 5 hours ago)

Breitbart said Kellogg was denigrating "to its own detriment" a loyal and engaged community of consumers who helped elect Trump, saying the site had 45 million unique visitors in the last thirty days.

"Kellogg's decision to blacklist one of the largest conservative media outlets in America is economic censorship of mainstream conservative political discourse," it said in a statement. "That is as un-American as it gets."